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/*
* Copyright © 2004 David Reveman, Peter Nilsson
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the names of
* David Reveman and Peter Nilsson not be used in advertising or
* publicity pertaining to distribution of the software without
* specific, written prior permission. David Reveman and Peter Nilsson
* makes no representations about the suitability of this software for
* any purpose. It is provided "as is" without express or implied warranty.
*
* DAVID REVEMAN AND PETER NILSSON DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL DAVID REVEMAN AND
* PETER NILSSON BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
* OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*
* Authors: David Reveman <c99drn@cs.umu.se>
* Peter Nilsson <c99pnn@cs.umu.se>
*/
#ifdef HAVE_CONFIG_H
# include "../config.h"
#endif
#include "glitz_aglint.h"
static void
_glitz_agl_context_create (glitz_agl_thread_info_t *thread_info,
AGLPixelFormat pixel_format,
glitz_agl_context_t *context)
{
context->context =
aglCreateContext (pixel_format, thread_info->root_context.context);
context->pixel_format = pixel_format;
}
glitz_agl_context_t *
glitz_agl_context_get (glitz_agl_thread_info_t *thread_info,
glitz_format_t *format,
glitz_bool_t offscreen)
{
glitz_agl_context_t *context;
glitz_agl_context_t **contexts = thread_info->contexts;
int index, n_contexts = thread_info->n_contexts;
if (thread_info->format_ids[format->id] == (AGLPixelFormat) 0)
return &thread_info->root_context;
for (; n_contexts; n_contexts--, contexts++)
if ((*contexts)->pixel_format == thread_info->format_ids[format->id] &&
(*contexts)->offscreen == offscreen)
return *contexts;
index = thread_info->n_contexts++;
thread_info->contexts =
realloc (thread_info->contexts,
sizeof (glitz_agl_context_t *) * thread_info->n_contexts);
context = malloc (sizeof (glitz_agl_context_t));
thread_info->contexts[index] = context;
_glitz_agl_context_create (thread_info,
thread_info->format_ids[format->id],
context);
context->offscreen = offscreen;
return context;
}
void
glitz_agl_context_destroy (glitz_agl_thread_info_t *thread_info,
glitz_agl_context_t *context)
{
aglDestroyContext (context->context);
free (context);
}
static void
glitz_agl_context_set_surface_anti_aliasing (glitz_agl_surface_t *surface)
{
if (surface->base.format->multisample.supported) {
if (surface->base.polyedge == GLITZ_POLYEDGE_SMOOTH) {
glEnable (GLITZ_GL_MULTISAMPLE_ARB);
if (surface->thread_info->agl_feature_mask &
GLITZ_AGL_FEATURE_MULTISAMPLE_FILTER_MASK) {
if (surface->base.polyedge_smooth_hint ==
GLITZ_POLYEDGE_SMOOTH_HINT_FAST)
glHint (GLITZ_GL_MULTISAMPLE_FILTER_HINT_NV, GLITZ_GL_FASTEST);
else
glHint (GLITZ_GL_MULTISAMPLE_FILTER_HINT_NV, GLITZ_GL_NICEST);
}
} else
glDisable (GLITZ_GL_MULTISAMPLE_ARB);
}
}
void
glitz_agl_context_make_current (glitz_agl_surface_t *surface,
glitz_bool_t flush)
{
AGLContext context;
AGLDrawable drawable = (AGLDrawable) 0;
AGLPbuffer pbuffer = (AGLPbuffer) 0;
if (flush)
glFlush ();
if ((!surface->drawable) && (!surface->pbuffer)) {
context = surface->thread_info->root_context.context;
} else {
context = surface->context->context;
pbuffer = surface->pbuffer;
drawable = surface->drawable;
}
if (pbuffer)
aglSetPBuffer (context, pbuffer, 0, 0, 0);
else
aglSetDrawable (context, drawable);
aglSetCurrentContext (context);
}
static void
glitz_agl_context_update (glitz_agl_surface_t *surface,
glitz_constraint_t constraint)
{
AGLContext context = aglGetCurrentContext ();
switch (constraint) {
case GLITZ_CN_NONE:
break;
case GLITZ_CN_ANY_CONTEXT_CURRENT:
if (context == NULL)
glitz_agl_context_make_current (surface, 0);
break;
case GLITZ_CN_SURFACE_CONTEXT_CURRENT:
if (context != surface->context->context)
glitz_agl_context_make_current (surface, (context)? 1: 0);
break;
case GLITZ_CN_SURFACE_DRAWABLE_CURRENT:
if (context != surface->context->context) {
glitz_agl_context_make_current (surface, (context)? 1: 0);
} else {
if (surface->pbuffer) {
AGLPbuffer pbuffer;
GLuint unused;
aglGetPBuffer (surface->context->context, &pbuffer,
&unused, &unused, &unused);
if (pbuffer != surface->pbuffer)
glitz_agl_context_make_current (surface, (context)? 1: 0);
} else if (surface->drawable) {
if (aglGetDrawable (surface->context->context) != surface->drawable)
glitz_agl_context_make_current (surface, (context)? 1: 0);
}
}
glitz_agl_context_set_surface_anti_aliasing (surface);
break;
}
}
glitz_agl_surface_t *
glitz_agl_context_push_current (glitz_agl_surface_t *surface,
glitz_constraint_t constraint)
{
glitz_agl_thread_info_t *thread_info;
glitz_agl_context_info_t *context_info;
int index;
thread_info = surface->thread_info;
index = thread_info->context_stack_size++;
thread_info->context_stack =
realloc (thread_info->context_stack,
sizeof (glitz_agl_context_info_t) *
thread_info->context_stack_size);
context_info = &thread_info->context_stack[index];
context_info->surface = surface;
context_info->constraint = constraint;
glitz_agl_context_update (context_info->surface, constraint);
if (context_info->constraint == GLITZ_CN_SURFACE_DRAWABLE_CURRENT)
return context_info->surface;
return NULL;
}
glitz_agl_surface_t *
glitz_agl_context_pop_current (glitz_agl_surface_t *surface)
{
glitz_agl_thread_info_t *thread_info;
glitz_agl_context_info_t *context_info = NULL;
int index;
thread_info = surface->thread_info;
thread_info->context_stack_size--;
index = thread_info->context_stack_size - 1;
thread_info->context_stack =
realloc (thread_info->context_stack,
sizeof (glitz_agl_context_info_t) *
thread_info->context_stack_size);
context_info = &thread_info->context_stack[index];
if (context_info->surface)
glitz_agl_context_update (context_info->surface, context_info->constraint);
if (context_info->constraint == GLITZ_CN_SURFACE_DRAWABLE_CURRENT)
return context_info->surface;
return NULL;
}
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